Fast Domain Checker

by core42x · Developer Tools

Manifest V3 Free

View in Chrome Web Store Data as of 17 Oct 2026

Quickly check domain availability across popular TLDs.

Users

+6 in 30 days

Rating

5.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#185K

#155K among extensions

Version

1.0.0

updated 6 Jul 2026

Users

monthly, 3 months

Latest, 17 Oct 2026: 11 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 months

Latest, 17 Oct 2026: 3 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Fast Domain Checker

Find your perfect domain name in milliseconds. Fast Domain Checker is a lightweight, privacy-first developer tool designed to verify domain availability across 100+ Top-Level Domains (TLDs) instantly. Instead of relying on slow WHOIS lookups, our extension queries Google's Public DNS API to deliver lightning-fast results with ~90% accuracy. If it's not connected to a host, it shows as available! 🚀 KEY FEATURES: • Instant Verification: Check multiple domains at once without loading screens. • Smart TLD Management: Pin your favorite extensions (.com, .io, .ai, etc.) and hide the rest. • Favorites & History: Star your best ideas and keep track of your recent searches. All data is saved strictly locally on your device. • Beautiful UI: Seamlessly adapts to your workflow with stunning Dark and Light modes. • One-Click Copy: Copy available domains instantly to your clipboard. 🔒 PRIVACY FIRST: We respect your data. Fast Domain Checker does not track you, does not use analytics, and never sends your personal data to any external servers. Your history and preferences stay 100% local. Built with performance and minimal design in mind. Powered by Core42.